package com.liaoxuefeng.java_thread.java01;

public class StrintUniconTest {

    public static void main(String[] args) {

        String si = "Hello";
        System.out.println(si);
        String s2 = new String(new char[]{'H', 'e', 'l', 'l', 'o'});
        System.out.println(s2);

        // String s3 = si.toUpperCase();
        si = si.toUpperCase();
        System.out.println(si);
        s2 = "";
        System.out.println(s2.isEmpty());

        System.out.println(Integer.getInteger("java version"));

        char[] cs = "Hello" .toCharArray();
        System.out.println(cs);
        String cts = new String(cs);
        System.out.println(cts);

    }
}
